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Login into windows, type 'device manager' into the search and press enter. Once in 'device manager' navigate to 'keyboard' and click on it. Right click and select uninstall. Then restart your computer, windows should automatically reinstall the keyboard driver and your keyboard should now be working.

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Solved: Laptop Keyboard Not Working
27 MARCH, 2014 BY JAY BOKHIRIA17 COMMENTSMy Laptop Keyboard Not Working? Here I solve HP, Dell, Lenovo, Toshiba, Acer, Asus, Samsung, Sony, etc., laptop keyboard not working. This question is asked by peter and last few days I was working on this issue. There are many factors are related to this issue. So after lot's of hard working I was found some tips and tricks to solve laptop keyboard problem. Laptop keyboard is attached with high complexity, so we don't open it by self and repair it, but there is no problem with your hardware because as I said above there are many factors related to this issue. So here I give you some tips and experiments that I used by self and it's working on many laptops, so follow tips one by one.
How To Fix Laptop Keyboard Not Working

Tip 1:

Reboot (Restart) your laptop because Restart solve many problems instantly. So first Restart your laptop and check keyboard working or not, if not working then follow tip 2.

Tip 2:

Restore your system: System Restore is the best way to solve keyboard software problems. If your keyboard not working after install Unknown Software then this trick is working for you. If not working, then follow Tip 3.
Best Keyboard: Best Gaming Keyboard 2015

Tip 3:

Check Your Drivers are up to date or not. If not, then update drivers first and then restart and check your keyboard working or not.
Also Check: 20 Windows Keyboard Shortcuts

Tip 4:

After update keyboard drivers and still your keyboard not working, then follow the simple steps.
Step 1:
Open Run and type "devmgmt.msc" then enter to open device manager or Type "Device Manager" in search and open Device Manager.
Step 2:
In Device Manager finds Keyboard and then right click on Keyboard device and click Scan for hardware changes. Watch below video for better understanding.

Watch Video Tutorial Here
Solution 2: Watch Video Here
Conclusion
If This Post Helpful for You, Then Follow Me:
The above steps are working for you if there is Software problem in your laptop. If there is a hardware problem with your keyboard, then contact your technician or Buy New USB Keyboard for your laptop. If you have any other question or queries, then please comment below I will happy to solve your problems.

Keyboard could need replacing. Try connecting a USB external keyboard and see if it works. If it works okay, you need to have the laptop keyboard connections checked. Replace the keyboard if connections appear to be okay.

If the keyboard has a round purple connector, power down the computer then unplug and then plug in the keyboard. Power on the computer. If it works your done if it doesn't replace the keyboard. If this is a USB keyboard, with the computer on, unplug and plug in the keyboard if it works great, if it still isn't working replace the keyboard. NOTE if this is a multi functional keyboard (special keys at the top) make sure you install the driver and any software associated with the keyboard.

Keyboards should be cleaned with "spray-n-wipe" cleaner and a cloth or tissue on a monthly basis. Ensure that computer is not powered up while cleaning the keyboard. Compressed air can also be used to clean between the keyboard keys. Another tip: clean the keys with a cotton swab dipped in alcohol.

"Keyboard Not Found" Message:

Your keyboard is not plugged into the computer securely. Unplug it and plug it back in and the problem should go away. If this doesn't work, follow procedure: "Computer isn't taking inputs from keyboard" (below).

Key Is Stuck:

1. If a key does not work or is stuck in the down position, you may try to remove it with a CPU "chip puller" tool. These simple "L" shaped tools are great at pulling out keys. Once you've pulled out the stuck key, you can try to stretch the spring to "reanimate" its action.

Computer Isn't Taking Inputs From Keyboard

1. Is keyboard connected to computer? Ensure that the keyboard is plugged into the keyboard jack and not into the mouse jack. If the keyboard was unplugged, plug it back in and reboot the computer.

2. If the keyboard still doesn't work on boot-up, power down the computer and try to borrow a friend's known-good keyboard for troubleshooting. Plug the new keyboard up and boot up the computer. If the new keyboard works, the old keyboard is bad and needs to be replaced.

3. If the known-good keyboard doesn't work, check your BIOS to make sure it sees the keyboard. It should say, "installed." If the BIOS recognizes the keyboard, then you probably have a bad keyboard port.

I Plugged Keyboard Into Mouse Port

1. Many mice and keyboards today use a PS/2 connector. If you plugged your keyboard into the mouse port (or viceversa), follow steps 2 and 3.

2. Shut down the computer and plug the keyboard into the keyboard port. The keyboard port is usually marked with a "keyboard" symbol. Plug the mouse into the mouse port (usually marked with a mouse symbol).

3. Reboot the computer; the keyboard should work now. If keyboard doesn't work, check your BIOS to make sure the BIOS recognizes the keyboard. You should see the words, "installed" or "enabled" under the keyboard.

4. If the BIOS recognizes the keyboard but it still doesn't work, you may have a bad keyboard port.

I Spilled a drink on my keyboard!

1. If you spill any liquid in the keyboard, turn it upside down ASAP. Drain all the water out of the keyboard, shaking it if necessary. If you've spilled water into the keyboard, just let it dry. You may use a hair dryer to dry out area under the keys (remember, too much heat and you could damage the electrical components).

2. If you've spilled a soda into the keyboard, completely rinse it in warm water. No soap please! You may use a hair dryer at this point or just let it dry for 2 days. Ensure the keyboard is perfectly DRY before you attempt to use it again. Don't plug a wet keyboard into electrical equipment. Think safety.

If you get 'Keyboard Failure' message it can have two reasons.
1) The keyboard is not working properly. You will have to replace it.
2) If your keyboard has a PS/2 jack, the PS/2 keyboard port of your computer is not working. Buy an USB keyboard.
You can take your computer to the store and check which type of new keyboard (PS/2 or USB) works with your computer, before paying for it.

Did you install the CD software program for the Keyboard?The Keyboard should have been plugged in before you started your computer. Then you should have installed the CD program.

Also after installation if it doesn't work try the following:
Normal
0
Press the Receiver button (and the lights will start
flashing.
Then if the Keyboard isn't working, press the small RESET/CONNECT
button on the back of the board to connect the keyboard to the
receiver.